North west-army: 1919, 2 Kop. (2), 3 Kop. with inverted overprint, 5 Kop. as well 3 Rbl. 50 Kop. postal stamps on window envelope with cancellation "PSKOV 15.10.19" and arrival stamp Fiume 4.11.19, rare document - if philatelic influenced, trial proofs and stamps with inverted overprints were at Earned citizen to the free use handed over, photo expertize Hovest VP (2018) : "a nice and rare cover very fine. "